When solving an equation with two variables, replace the variables with the values given and then solve the now variable-free equation. (Remember order of operations, PEMDAS, Parentheses, Exponents, Multiplication/Division, Addition/Subtraction.)
Solve -a + 3a = 6a + y - 7 for a in terms of y.
| -\(\frac{2}{13}\)y - \(\frac{8}{13}\) | |
| \(\frac{2}{7}\)y + 1 | |
| -9y - 9 | |
| -1\(\frac{6}{7}\)y - \(\frac{3}{7}\) |